反应球磨法制备Mg-Ni-M(M=Ni,Nb,Y,Ti)储氢材料及其放氢性能的研究  

Hydrogen desorption properties of reactive ball milled Mg-Ni-M(M=Ni,Nb,Y,Ti) composite materials

作　　者：王宏宾[1,2] 年洪恩[1] 任秀峰[1] 李翔[1,2] 周园[1] 

机构地区：[1]中国科学院青海盐湖研究所,西宁810008 [2]中国科学院研究生院,北京100049

出　　处：《粉末冶金技术》2011年第4期259-262,共4页Powder Metallurgy Technology

基　　金：青海省科技厅基金项目(0841051026)

摘　　要：采用反应球磨法直接制备Mg-10%(质量分数,下同)(1/4M-3/4Ni)(M=Ni、Nb、Y、Ti,M和Ni比例为原子比)储氢材料,球磨在5×105Pa H2气氛中运行30h。用X射线衍射、扫描电镜、示差扫描量热等方法对样品进行了结构、形貌及热分析表征。结果表明,Mg-Ni体系中添加Ti、Y生成MgH2的量最多,而添加Nb生成MgH2量最少,Mg-Ni-Y放氢容量比Mg-Ni的多1.3561%H;添加Y放氢温度最低,放氢温度比Mg-Ni的低20℃。In this study Mg-10wt%（1/4M-3/4Ni）（M=Ni,Nb,Y,Ti;x（M）∶ x（Ni）=1∶ 3 in molar ratio） compsite materials were prepared by reactive ball milling.The Mg-Ni-M powder was reactive ball milled for 30h in 5×105Pa H2 pressure.The phase,morphology and thermal analysis of the products were characterized by powder X-ray diffraction（XRD）,scanning electron microscopy（SEM）,differential scaning calorimety（DSC） and thermogravimety（TG）,respectively.The experimental results show that the most amount of MgH2 are got by doping Y or Ti,where as the lowest amount of MgH2 are got by doping Nb.The measured hydrogen desorption capacity of Mg-Ni-Y is more than Mg-Ni by 1.3561wt%H2.Moreover,the addition of Y significantly decreases the desorption temperature,about 20 ℃ lower than Mg-Ni.

关 键 词：储氢 反应球磨 放氢 热分析 

分 类 号：TF125.8[冶金工程—粉末冶金]